/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/trex02-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 12:46:34,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 12:46:34,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 12:46:34,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 12:46:34,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 12:46:34,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 12:46:34,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 12:46:34,463 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 12:46:34,474 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 12:46:34,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 12:46:34,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 12:46:34,476 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 12:46:34,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 12:46:34,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 12:46:34,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 12:46:34,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 12:46:34,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 12:46:34,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 12:46:34,478 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 12:46:34,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 12:46:34,478 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 12:46:34,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 12:46:34,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 12:46:34,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 12:46:34,479 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 12:46:34,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 12:46:34,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:46:34,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 12:46:34,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 12:46:34,480 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 12:46:34,480 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 12:46:34,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 12:46:34,480 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 12:46:34,480 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 12:46:34,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 12:46:34,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 12:46:34,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 12:46:34,736 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 12:46:34,737 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 12:46:34,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-1.c [2022-03-20 12:46:34,804 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8a8028b9/507f9a35beda499bbd4c3c843a381492/FLAG9a0382beb [2022-03-20 12:46:35,122 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 12:46:35,122 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-1.c [2022-03-20 12:46:35,127 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8a8028b9/507f9a35beda499bbd4c3c843a381492/FLAG9a0382beb [2022-03-20 12:46:35,136 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8a8028b9/507f9a35beda499bbd4c3c843a381492 [2022-03-20 12:46:35,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 12:46:35,139 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 12:46:35,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 12:46:35,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 12:46:35,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 12:46:35,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:46:35" (1/1) ... [2022-03-20 12:46:35,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40b31bb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:35, skipping insertion in model container [2022-03-20 12:46:35,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:46:35" (1/1) ... [2022-03-20 12:46:35,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 12:46:35,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 12:46:35,285 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-1.c[320,333] [2022-03-20 12:46:35,308 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:46:35,315 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 12:46:35,326 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-1.c[320,333] [2022-03-20 12:46:35,328 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:46:35,336 INFO L208 MainTranslator]: Completed translation [2022-03-20 12:46:35,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:35 WrapperNode [2022-03-20 12:46:35,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 12:46:35,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 12:46:35,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 12:46:35,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 12:46:35,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:35" (1/1) ... [2022-03-20 12:46:35,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:35" (1/1) ... [2022-03-20 12:46:35,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:35" (1/1) ... [2022-03-20 12:46:35,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:35" (1/1) ... [2022-03-20 12:46:35,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:35" (1/1) ... [2022-03-20 12:46:35,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:35" (1/1) ... [2022-03-20 12:46:35,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:35" (1/1) ... [2022-03-20 12:46:35,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 12:46:35,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 12:46:35,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 12:46:35,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 12:46:35,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:35" (1/1) ... [2022-03-20 12:46:35,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:46:35,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:35,388 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 12:46:35,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 12:46:35,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 12:46:35,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 12:46:35,450 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 12:46:35,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 12:46:35,450 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2022-03-20 12:46:35,450 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 12:46:35,451 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 12:46:35,451 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 12:46:35,451 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 12:46:35,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 12:46:35,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 12:46:35,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-03-20 12:46:35,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 12:46:35,454 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2022-03-20 12:46:35,454 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 12:46:35,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 12:46:35,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 12:46:35,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 12:46:35,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 12:46:35,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 12:46:35,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 12:46:35,512 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 12:46:35,514 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 12:46:35,623 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 12:46:35,628 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 12:46:35,628 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 12:46:35,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:46:35 BoogieIcfgContainer [2022-03-20 12:46:35,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 12:46:35,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 12:46:35,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 12:46:35,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 12:46:35,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:46:35" (1/3) ... [2022-03-20 12:46:35,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2edf317a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:46:35, skipping insertion in model container [2022-03-20 12:46:35,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:35" (2/3) ... [2022-03-20 12:46:35,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2edf317a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:46:35, skipping insertion in model container [2022-03-20 12:46:35,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:46:35" (3/3) ... [2022-03-20 12:46:35,637 INFO L111 eAbstractionObserver]: Analyzing ICFG trex02-1.c [2022-03-20 12:46:35,641 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 12:46:35,641 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 12:46:35,677 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 12:46:35,702 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 12:46:35,702 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 12:46:35,716 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 12:46:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 12:46:35,728 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:35,729 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:35,729 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:35,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:35,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1589172536, now seen corresponding path program 1 times [2022-03-20 12:46:35,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:35,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [938677234] [2022-03-20 12:46:35,765 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 12:46:35,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1589172536, now seen corresponding path program 2 times [2022-03-20 12:46:35,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:35,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518265344] [2022-03-20 12:46:35,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:35,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:35,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:46:35,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:35,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518265344] [2022-03-20 12:46:35,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518265344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:35,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:35,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 12:46:35,946 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:35,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [938677234] [2022-03-20 12:46:35,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [938677234] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:35,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:35,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 12:46:35,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176589176] [2022-03-20 12:46:35,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:35,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 12:46:35,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:35,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 12:46:35,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 12:46:35,981 INFO L87 Difference]: Start difference. First operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:36,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:36,051 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-03-20 12:46:36,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 12:46:36,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 12:46:36,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:36,067 INFO L225 Difference]: With dead ends: 35 [2022-03-20 12:46:36,067 INFO L226 Difference]: Without dead ends: 18 [2022-03-20 12:46:36,070 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 12:46:36,075 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:36,077 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 29 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:46:36,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-20 12:46:36,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-20 12:46:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.2) internal successors, (12), 12 states have internal predecessors, (12), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 12:46:36,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-03-20 12:46:36,120 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2022-03-20 12:46:36,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:36,120 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-03-20 12:46:36,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:36,121 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-03-20 12:46:36,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 12:46:36,122 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:36,122 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:36,122 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 12:46:36,123 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:36,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:36,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1578090284, now seen corresponding path program 1 times [2022-03-20 12:46:36,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:36,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1733781063] [2022-03-20 12:46:36,129 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 12:46:36,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1578090284, now seen corresponding path program 2 times [2022-03-20 12:46:36,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:36,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565941281] [2022-03-20 12:46:36,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:36,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:36,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:46:36,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:36,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565941281] [2022-03-20 12:46:36,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565941281] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:36,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:36,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 12:46:36,263 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:36,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1733781063] [2022-03-20 12:46:36,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1733781063] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:36,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:36,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 12:46:36,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302678098] [2022-03-20 12:46:36,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:36,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 12:46:36,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:36,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 12:46:36,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 12:46:36,266 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:36,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:36,373 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-03-20 12:46:36,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 12:46:36,374 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 12:46:36,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:36,374 INFO L225 Difference]: With dead ends: 18 [2022-03-20 12:46:36,374 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 12:46:36,375 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 12:46:36,376 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:36,376 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 54 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:46:36,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 12:46:36,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 12:46:36,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 12:46:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 12:46:36,379 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2022-03-20 12:46:36,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:36,379 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 12:46:36,379 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:36,379 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 12:46:36,379 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 12:46:36,381 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 12:46:36,382 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 12:46:36,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 12:46:36,481 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2022-03-20 12:46:36,482 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2022-03-20 12:46:36,485 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2022-03-20 12:46:36,503 INFO L885 garLoopResultBuilder]: At program point fooEXIT(lines 17 19) the Hoare annotation is: true [2022-03-20 12:46:36,504 INFO L878 garLoopResultBuilder]: At program point fooENTRY(lines 17 19) the Hoare annotation is: (= ~x~0 |old(~x~0)|) [2022-03-20 12:46:36,504 INFO L885 garLoopResultBuilder]: At program point fooFINAL(lines 17 19) the Hoare annotation is: true [2022-03-20 12:46:36,504 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 21 29) the Hoare annotation is: (or (not (<= |old(~x~0)| 0)) (= ~x~0 |old(~x~0)|)) [2022-03-20 12:46:36,504 INFO L885 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: true [2022-03-20 12:46:36,504 INFO L885 garLoopResultBuilder]: At program point L25(lines 25 26) the Hoare annotation is: true [2022-03-20 12:46:36,504 INFO L885 garLoopResultBuilder]: At program point L26-1(lines 23 27) the Hoare annotation is: true [2022-03-20 12:46:36,504 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 21 29) the Hoare annotation is: true [2022-03-20 12:46:36,505 INFO L885 garLoopResultBuilder]: At program point L25-1(line 25) the Hoare annotation is: true [2022-03-20 12:46:36,505 INFO L878 garLoopResultBuilder]: At program point L23-2(lines 23 27) the Hoare annotation is: (or (<= ~x~0 0) (not (<= |old(~x~0)| 0))) [2022-03-20 12:46:36,505 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 21 29) the Hoare annotation is: true [2022-03-20 12:46:36,505 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (<= ~x~0 0) [2022-03-20 12:46:36,505 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~x~0 |old(~x~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 12:46:36,505 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (<= ~x~0 0) [2022-03-20 12:46:36,505 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 12:46:36,505 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~x~0 0) [2022-03-20 12:46:36,505 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 12:46:36,506 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 12:46:36,506 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2022-03-20 12:46:36,506 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2022-03-20 12:46:36,506 INFO L878 garLoopResultBuilder]: At program point L7(line 7) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (<= ~x~0 0))) [2022-03-20 12:46:36,506 INFO L878 garLoopResultBuilder]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0)) (not (<= ~x~0 0))) [2022-03-20 12:46:36,506 INFO L885 garLoopResultBuilder]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2022-03-20 12:46:36,506 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (<= ~x~0 0))) [2022-03-20 12:46:36,509 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2] [2022-03-20 12:46:36,510 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 12:46:36,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 12:46:36 BoogieIcfgContainer [2022-03-20 12:46:36,533 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 12:46:36,535 INFO L158 Benchmark]: Toolchain (without parser) took 1394.79ms. Allocated memory is still 184.5MB. Free memory was 138.8MB in the beginning and 164.4MB in the end (delta: -25.6MB). Peak memory consumption was 28.9MB. Max. memory is 8.0GB. [2022-03-20 12:46:36,536 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 184.5MB. Free memory was 155.1MB in the beginning and 155.0MB in the end (delta: 90.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 12:46:36,536 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.49ms. Allocated memory is still 184.5MB. Free memory was 138.5MB in the beginning and 163.9MB in the end (delta: -25.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 12:46:36,540 INFO L158 Benchmark]: Boogie Preprocessor took 21.44ms. Allocated memory is still 184.5MB. Free memory was 163.9MB in the beginning and 162.5MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 12:46:36,540 INFO L158 Benchmark]: RCFGBuilder took 270.67ms. Allocated memory is still 184.5MB. Free memory was 162.5MB in the beginning and 152.9MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-20 12:46:36,541 INFO L158 Benchmark]: TraceAbstraction took 902.02ms. Allocated memory is still 184.5MB. Free memory was 152.4MB in the beginning and 164.4MB in the end (delta: -12.0MB). Peak memory consumption was 42.0MB. Max. memory is 8.0GB. [2022-03-20 12:46:36,542 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 184.5MB. Free memory was 155.1MB in the beginning and 155.0MB in the end (delta: 90.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 196.49ms. Allocated memory is still 184.5MB. Free memory was 138.5MB in the beginning and 163.9MB in the end (delta: -25.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.44ms. Allocated memory is still 184.5MB. Free memory was 163.9MB in the beginning and 162.5MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 270.67ms. Allocated memory is still 184.5MB. Free memory was 162.5MB in the beginning and 152.9MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 902.02ms. Allocated memory is still 184.5MB. Free memory was 152.4MB in the beginning and 164.4MB in the end (delta: -12.0MB). Peak memory consumption was 42.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 12 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12 mSDsluCounter, 83 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 42 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 33 IncrementalHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 41 mSDtfsCounter, 33 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 24 LocationsWithAnnotation, 33 PreInvPairs, 40 NumberOfFragments, 80 HoareAnnotationTreeSize, 33 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 24 FomulaSimplificationsInter, 27 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for foo Derived contract for procedure foo: 1 - ProcedureContractResult [Line: 21]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! [2022-03-20 12:46:36,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...